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- Title
Accelerating universe in terms of Hankel function index.
- Authors
Suratgar, K.; Mohsenzadeh, M.; Yusofi, E.; Taghizadeh-Farahmand, F.
- Abstract
In this paper, F (ν) cosmology is proposed for the accelerating universe with asymptotic de Sitter expansion in terms of Hankel function index ν. To some extent, both the initial expansion during early inflation and the current accelerated expansion can be studied with a vacuum cosmic fluid, i.e. Λ in the pure de Sitter phase. Observational data further support the notion of a quasi-vacuum fluid, rather than a pure vacuum, contributing to the quasi-de Sitter acceleration in both the early and late universe. By examining the asymptotic expansion of the Henkel function as an approximate solution of the Mukhanov–Sasaki equation, we seek a more detailed study of quasi-de Sitter solutions in cosmology containing vacuum-like fluid.
- Subjects
EXPANDING universe; HANKEL functions; HENKEL AG &; Co. KGaA; ASYMPTOTIC expansions; FRIEDMANN equations; PHYSICAL cosmology
- Publication
Modern Physics Letters A, 2024, Vol 39, Issue 1, p1
- ISSN
0217-7323
- Publication type
Article
- DOI
10.1142/S021773232350178X